Final answer:
To simplify the expression, we combine the like terms and add the exponents.
Step-by-step explanation:
To simplify the expression 7√x5 * 7√x5, we can combine the like terms. Since both terms have the same radicand (x5), we can add the exponents and keep the radicand the same. So we have (7 * 7)√x5+5 = 49√x10. Therefore, the simplified form of the expression is 49√x10.